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Title: Process for recovering alkali metals and sulfur from alkali metal sulfides and polysulfides

Abstract

Alkali metals and sulfur may be recovered from alkali monosulfide and polysulfides in an electrolytic process that utilizes an electrolytic cell having an alkali ion conductive membrane. An anolyte solution includes an alkali monosulfide, an alkali polysulfide, or a mixture thereof and a solvent that dissolves elemental sulfur. A catholyte includes molten alkali metal. Applying an electric current oxidizes sulfide and polysulfide in the anolyte compartment, causes alkali metal ions to pass through the alkali ion conductive membrane to the catholyte compartment, and reduces the alkali metal ions in the catholyte compartment. Liquid sulfur separates from the anolyte solution and may be recovered. The electrolytic cell is operated at a temperature where the formed alkali metal and sulfur are molten.

Inventors:
;
Publication Date:
Research Org.:
Ceramatec, Inc., Salt Lake City, UT (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1330350
Patent Number(s):
9,475,998
Application Number:
14/210,891
Assignee:
CERAMATEC, INC. (Salt Lake City, UT)
DOE Contract Number:  
FE0000408
Resource Type:
Patent
Resource Relation:
Patent File Date: 2014 Mar 12
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Gordon, John Howard, and Alvare, Javier. Process for recovering alkali metals and sulfur from alkali metal sulfides and polysulfides. United States: N. p., 2016. Web.
Gordon, John Howard, & Alvare, Javier. Process for recovering alkali metals and sulfur from alkali metal sulfides and polysulfides. United States.
Gordon, John Howard, and Alvare, Javier. Tue . "Process for recovering alkali metals and sulfur from alkali metal sulfides and polysulfides". United States. https://www.osti.gov/servlets/purl/1330350.
@article{osti_1330350,
title = {Process for recovering alkali metals and sulfur from alkali metal sulfides and polysulfides},
author = {Gordon, John Howard and Alvare, Javier},
abstractNote = {Alkali metals and sulfur may be recovered from alkali monosulfide and polysulfides in an electrolytic process that utilizes an electrolytic cell having an alkali ion conductive membrane. An anolyte solution includes an alkali monosulfide, an alkali polysulfide, or a mixture thereof and a solvent that dissolves elemental sulfur. A catholyte includes molten alkali metal. Applying an electric current oxidizes sulfide and polysulfide in the anolyte compartment, causes alkali metal ions to pass through the alkali ion conductive membrane to the catholyte compartment, and reduces the alkali metal ions in the catholyte compartment. Liquid sulfur separates from the anolyte solution and may be recovered. The electrolytic cell is operated at a temperature where the formed alkali metal and sulfur are molten.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {10}
}

Patent:

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Works referenced in this record:

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  • S├ínchez-Delgado, Roberto A.
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